139) pH of 0.1M monobasic acid solution is found to be 2. Its osmotic pressure at T K is:

140) 0.01M solution of KCl nad BaCl₂ are prepared in water. The freezing point of KCl is found to be −2^oC. What is the freezing point of BaCl₂ solution, assuming both to be completely ionized?

141) A 5% solution of sugarcane (mass = 342) is isotonic with 1% solution of X under similar conditions. The molecular weight of X is:

142) Which one of the following is the most effective in causing the coagulation of an As₂S₃ solution:

143) The use of anhydrous common salts is to clear snow on the roads. This causes: